Split stack

1. Click the Add raster layer and select the file C:/OSGeo4W64/geodata/raster/s2/Subset_S2A_MSIL2A_20170619T.tif.
2. After clicking Open, the raster layer appears on the QGIS canvas.
3. In the processing toolbar, type Translate into the search field to find the GDAL\OGR --> Translate (Convert format tool and open it.
4. Unfold the Advanced parameters and change the output data format to unsigned 16bit integer): -ot UInt16
5. Click the button ... of Converted to select path and name of output file.
6. Type in the textbox Additional creation parameters: -b 1

(Select only first band).

1. Click Run.

Repeat the steps for other bands: change the name of the output file and edit the -b option accordingly.

1. Create a multiband file with a spectral subset of 4 bands. Change the output file and the additional creation options: *Subset_S2A_MSIL2A_20170619T_B02030408.tif

• -b 2 -b 3 -b 4 -b 8

1. Click Run.